可再生能源2026，Vol.44Issue(3)：373-383,11.
构网型储能所接线路电流差动保护适应性分析及改进判据研究
Research on the adaptability of traditional protection and improved criteria of current differential protection for power lines integrated with grid-forming energy storage
摘要
Abstract
The short-circuit current provided by the grid-forming energy storage power sources(GFESPSs)distinct from conventional power sources due to its unique operation and control principle.Consequently,the conventional current differential protection deployed in the connected power grid is exposed to potential maloperation risks.Thus,this paper focuses on the widely adopted grid-forming energy storage based on virtual impedance.The short-circuit current fed by the GFESPSs is firstly analyzed.Further,the influence of the virtual impedance ratio and the GFESPSs'capacity on the currents phase angle difference and amplitude ratio on both sides of the connected line is developed.And the fault scenarios resulted in the incorrected operation of traditional current differential protection are revealed due to the integration with the GFESPSs.Aimed at the problems,an improved differential protection criterion is proposed based on the adaptive correction of the current phasor ratio.The effectiveness of the proposed protection criterion is verified through PSCAD/EMTDC simulation experiments.It is verified that the proposed criterion can identify correctly and reliably both internal and external faults of the line connected with GFESPSs.关键词
构网型储能/虚拟阻抗控制/短路电流/保护判据/差动保护Key words
grid-forming energy storage power sources/virtual impedance control/fault current/protection criterion/differential protection分类
能源科技引用本文复制引用
李诚帅,张峰,李晓纲,马伟东,董志玲,刘素梅..构网型储能所接线路电流差动保护适应性分析及改进判据研究[J].可再生能源,2026,44(3):373-383,11.基金项目
储能新能源场站建模服务(SGTYHT/23-JS-004). （SGTYHT/23-JS-004）
